Hyper Estraier is a full-text search system. You can search lots of documents
for some documents including specified words. If you run a web site, it is
useful as your own search engine for pages in your site. Also, it is useful as
search utility of mail boxes and file servers.

The characteristic of Hyper Estraier is the following.

 - High performance of search
 - High scalability of target documents
 - Perfect recall ratio by N-gram method
 - High precision by hybrid mechanism of N-gram and morphological analyzer
 - Phrase search, regular expressions, attribute search, and similarity search
 - Multilingualism with Unicode
 - Independent of file format and repository
 - Intelligent web crawler
 - Simple and powerful API
 - Supporting P2P architecture
